Major classes for munitions (combinations of below possible, except for Ball):
HE High Explosive type (link is for fragmentation type), effect like a mini-grenade (fragmentation type uses fragments with the HE effect)
AP Armored Piercing
I Incendiary (fire causing), often added suffix with AP (less often with HE)
T Tracer, has easily visible tail, but design is less likely to cause fire, often added suffix to another type
“Ball” Simple solid round, a Bullet, replaced/updated with others (used because its cheap), often used for practice.

BoS Birds of Steel, it is the ps3 and xbox360 game that became War Thunder.
WoT World of Tanks, from Wargaming.net, where survivors came from.
WoWP World of Warplanes from Wargaming.net, competing sim
IL-2 Old but still popular sim game when talking about games, engine for WoP, otherwise name of aircraft IL-2 Strumovik.
CoD Cliffs of Dover, competing war sim games (less likely use if Call of Duty)
AH Aces High, competing air sim wargame.
BGE WWII Online: Battleground Europe a competing and very, very old MMO game.

AW Air Warrior (possibly the first multiplayer air combat game, closed Dec 7, 2001)
WB Warbirds (very old game still being updated)

UI (User Interface):
GE Gold Eagles- Purchased with real money is the major currency that can be exchanged for SL, XP, CS, or special equipment.
SL Silver Lions- Minor currency used to purchase all manner of items, from airplanes to upgrades to munitions.
XP eXPeriance- earned to unlock next higher level of units (earned in game or can be purchased from GE).
CS Crew Skill Experience, earned playing and applied to each crew slot, can be purchased from GE (different from XP).

AB Arcade Battles (easy flight and DM model, use any or all aircraft in lineup)
HB Historic Battles (realistic FM, DM, only 1 aircraft)
FRB Full Real Battle (like HB, but cockpit view only, no markers on any aircraft, object.)

BnZ Boom and Zoom, diving in, attacking target, fly away; used by less maneuverable but fast aircraft
TnB Turn and Burn, turn with target until flaming mess; used by maneuverable aircraft.
TG Tail Gunner, defensive gun on aircraft that have them (usually but not always refere to rear one).